.form-horizontal {
    width: 500px;
    border: 1px solid #ccc;
    padding: 20px;
    margin: auto;
    margin-top: 100px;
    border-radius: 5px;
    box-shadow: 0px 0px 5px #000;
}

.form-horizontal label {
    width: 100px;
}

.form-horizontal>.form-group>div {
    width: 300px;
}